CalculatorCalculator
How to use
- Tap or type. Use the buttons or your keyboard: numbers, + - * /, ( ) and %.
- See the answer as you type. The result appears before you press =. Press Enter or = to finish.
- Fix mistakes. Backspace deletes one character; Esc clears everything.
- Copy the result. Click the big number to copy it without commas, ready to paste.
- Reuse earlier answers. Your last five calculations are saved below the keypad on this device. Click one to continue from it.
Order of operations
The calculator follows the usual math rules: parentheses first, then exponents, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 = 14, while (2 + 3) × 4 = 20. If you forget a closing parenthesis, it is added for you.
How the % key works
The percent key works like a phone calculator: 200 × 10% = 20, 50 + 10% = 55 and 50 − 10% = 45. For questions like "what percent of X is Y" or "how much did it change", use the percentage calculator.
Why 0.1 + 0.2 shows 0.3
Computers store decimals in binary, so many programs show 0.1 + 0.2 as 0.30000000000000004. This one rounds results to 12 significant digits, so you see the answer you expect.
FAQ
Is it free?
Yes. No sign-up, no download. It runs in your browser.
Is my calculation sent anywhere?
No. Everything is calculated on your own device. Your recent calculations are kept only in this browser.
Can I use it offline?
Once the page has loaded, the calculator keeps working even if your connection drops.
Related guide
- Order of Operations: PEMDAS, BODMAS and 8÷2(2+2)Why 2 + 3 × 4 is 14, how left-to-right rules work, why 8÷2(2+2) goes viral, and why a phone calculator can disagree with a formula calculator.
- Rounding Numbers: Decimal Places and Significant FiguresRound to decimal places or significant figures, round up or down, handle negative numbers, and see why 0.1 + 0.2 shows 0.30000000000000004.
- Averages Explained: Mean, Weighted Average, Median, ModeCalculate a mean and a weighted average, choose between mean, median and mode, avoid the average-of-averages trap, and find the score you need next.